Did some more research and seems as though its fairly common. Not sure if they are poorly fitted from factory and shoot loose or if its abuse during takedown but it seems to be common. There were a couple fixes that were fairly home repair friendly. After taking the barrel off and looking at why it was loose the how to fix is simple. Rimfirecentral has a how two article on the topic, follow the steps and wolla tight mark 11 once again. Thanks for the replies and advice. SN